Idaho Code § 18-1910

Every director of a corporation or joint stock association, although not present at a meeting of the directors at which any act, proceeding or omission of such directors in violation of this chapter occurs, is deemed to have concurred therein, if the facts constituting such violation appear on the records or minutes of the proceedings of the board of directors, and he remains a director of the same company for six months thereafter, and does not within that time cause, or in writing require, his dissent from such illegality to be entered in the minutes of the directors.